Home / 81,281.63-121,910.13-22,121.91

Finding the Fourth Proportional to 81,281.63, 121,910.13 and 22,121.91

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Solution

The fourth proportional to 81,281.63, 121,910.13 and 22,121.91 is: 33,179.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,281.63 : 121,910.13 = 22,121.91 : x
  2. Step 2: Convert to fraction form
    81,281.63/121,910.13 = 22,121.91/x
  3. Step 3: Cross multiply
    81,281.63x = 121,910.13 × 22,121.91
  4. Step 4: Simplify right side
    81,281.63x = 2,696,884,923.95
  5. Step 5: Solve for x
    x = 2,696,884,923.95/81,281.63
  6. Step 6: Final answer
    x = 33,179.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.